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- def zscore_element(x):
- N = len(x)
- mu = np.mean(x)
- mu_rmv = (N*np.mean(x) - x) / (N-1)
- sigma2 = np.var(x)
- sigma2_rmv = (N*sigma2 - (x-mu)*(x-mu_rmv))/(N-1)
- return (x - mu_rmv) / np.sqrt(sigma2_rmv)
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